What Height of scope rings provide adequate clearance when mounting the Nexus U-Mount under the firearms optic?

Five sixteenths of an inch of clearance between the bottom of a scope tube and Weaver or MIL-STD-1913 mounting platform is needed for mounting under a rifle scope. Medium rings and higher from the majority of rifle scope ring manufactures provide the necessary clearance.

What effect does a firearms action type have on use with the Nexus U-Mount?

The firearms action type when configured to record video of the individual operating the Firearm or down along the firearm’s barrel has no effect. Bolt action, Pump action, Lever action, and semiautomatic actions all work. However, when configured to record video through the firearms optical sight Bolt actions can be problematic because of clearance issues when cycling the bolt. The optical sights eye relief, mounting height and lateral positioning, as well as camera type used impact the adjustment settings necessary for proper alignment of the camera and optical sight. Bolt actions designed for rimfire cartridges used during the testing and evaluation process experienced no issues. Long actions, such as Remington’s action used for the 300 Ultra Mag cartridge, required the lateral adjustment arm to be removed to cycle the bolt. The lateral adjustment arm allows the camera to easily be removed and remounted without losing any adjustment settings. Semi-automatic actions are ideal for use with the Nexus U-Mount when configured to record video through the firearm’s optical sight.

What type of Smart Phone adapter can be used with the U-Mount?

Any Smart Phone adapter that is threaded for the industry standard quarter inch tripod screw and has the build quality to securely hold the phone in place can be used. The included smart phone mount has solid construction and was used on AR-15 Rifles, Shotguns, and Bolt action rifles with calibers up to Remington 300 Ultra Mag without malfunction or damage occurring to Smart Phones.

Is there a point of impact change when aiming with a camera’s display screen while recording video through the firearm’s optical sight?

When configured to properly align the camera with the firearms optical sight no point of impact shift occurs.

What are the torque specs for the attachment screws on the U-Mount?

Screws should be torqued to 16-20 inch pounds. Over torquing the screws creates the risk of stripping threads without offering any increase in performance.

Can the Nexus U-Mount be used as a camera mount for Airguns?

Airguns come with different scope base dimensions based on manufacture and model.  Their are Picatinny or Weaver scope base adapters from a variety of manufactures on the internet that mount right on the existing scope bases to successfully make the conversion.  Get the Picatinny or Weaver scope base  adapters and you’ll be good to go.

Can the Nexus U-Mount be used as a camera mount for shotguns?

Yes, if the shotgun has a Picatinny or Weaver scope base.  Many shotguns have receivers that have been drilled and tapped to accept scope bases for mounting optics on them.  Evolution Gun Works, or EGW, manufactures high quality Picatinny scope bases for the many of today’s shotguns.

If my firearm doesn’t have a Picatinny base can I install one?

Yes. Evolution Gun Works manufactures high quality one piece Picatinny bases for the majority of popular firearms.  One piece Picatinny bases are rugged and offer a rock-solid platform for mounting rifle scopes and accessories.  EGW provides a list of the manufactures and models of firearms they provide scope bases for along with the part number of the specific base.

Tips for mounting on an AR-15:

When configuring to record video through the optical sight there can be clearance interference with the charging handle for the bolt carrier group when chambering a cartridge. Variations in optical sight mounting positions as well as camera type will determine if clearance issues exists. If a clearance issue is present, there are two easy ways to negate this issue. The first is to lock the bolt carrier group to the rear and return the charging handle to the stowed position prior to mounting the camera. This allows use of the bolt release to chamber a cartridge. The second is to remove the camera while it is mounted by removing the knurled thumb screws on the linear adjustment arm. The holes on the linear adjustment arm provide safety and a means of measurement to remove and remount the camera. Removing the knurled thumb screws and replacing them through the same holes allows the camera to be quickly removed and remounted without losing adjustment settings. After the camera has been removed, the charging handle for the bold carrier group can be operated and the camera can be remounted.